Arid
DOI10.1021/acs.langmuir.6b02173
Microscale Mechanism of Age Dependent Wetting Properties of Prickly Pear Cacti (Opuntia)
Rykaczewski, Konrad1; Jordan, Jacob S.2; Linder, Rubin1; Woods, Erik T.1; Sun, Xiaoda1; Kemme, Nicholas1; Manning, Kenneth C.1; Cherry, Brian R.2; Yarger, Jeffery L.2; Majure, Lucas C.3,4
通讯作者Rykaczewski, Konrad
来源期刊LANGMUIR
ISSN0743-7463
出版年2016
卷号32期号:36页码:9335-9341
英文摘要

Cacti thrive in xeric environments through specialized water storage and collection tactics such as a shallow, widespread root system that maximizes rainwater absorption and spines adapted for fog droplet collection. However, in many cacti, the epidermis, not the spines, dominates the exterior surface area. Yet, little attention has been dedicated to studying interactions of the cactus epidermis with water drops. Surprisingly, the epidermis of plants in the genus Opuntia, also known as prickly pear cacti, has water-repelling characteristics. In this work, we report that surface properties of cladodes of 25 taxa of Opuntia grown in an arid Sonoran climate switch from water-repelling to superwetting under water impact over the span of a single season. We show that the old cladode surfaces are not superhydrophilic, but have nearly vanishing receding contact angle. We study water drop interactions with, as well as nano/microscale topology and chemistry of, the new and old cladodes of two Opuntia species and use this information to uncover the microscopic mechanism underlying this phenomenon. We demonstrate that composition of extracted wax and its contact angle do not change significantly with time. Instead, we show that the reported age dependent wetting behavior primarily stems from pinning of the receding contact line along multilayer surface microcracks in the epicuticular wax that expose the underlying highly hydrophilic layers.


类型Article
语种英语
国家USA
收录类别SCI-E
WOS记录号WOS:000383318100026
WOS关键词CONTACT-ANGLE HYSTERESIS ; LEAF SURFACE ; CHEMICAL-COMPOSITION ; EPICUTICULAR WAX ; LIQUID-DROPS ; FOG ; WETTABILITY ; COLLECTION ; MICROMORPHOLOGY ; CONTAMINATION
WOS类目Chemistry, Multidisciplinary ; Chemistry, Physical ; Materials Science, Multidisciplinary
WOS研究方向Chemistry ; Materials Science
来源机构Arizona State University
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/194967
作者单位1.Arizona State Univ, Sch Engn Matter Transport & Energy, Tempe, AZ 85287 USA;
2.Arizona State Univ, Sch Mol Sci, Tempe, AZ 85287 USA;
3.Desert Bot Garden, Dept Res Conservat & Collect, Phoenix, AZ 85008 USA;
4.Arizona State Univ, Sch Life Sci, Tempe, AZ 85287 USA
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GB/T 7714
Rykaczewski, Konrad,Jordan, Jacob S.,Linder, Rubin,et al. Microscale Mechanism of Age Dependent Wetting Properties of Prickly Pear Cacti (Opuntia)[J]. Arizona State University,2016,32(36):9335-9341.
APA Rykaczewski, Konrad.,Jordan, Jacob S..,Linder, Rubin.,Woods, Erik T..,Sun, Xiaoda.,...&Majure, Lucas C..(2016).Microscale Mechanism of Age Dependent Wetting Properties of Prickly Pear Cacti (Opuntia).LANGMUIR,32(36),9335-9341.
MLA Rykaczewski, Konrad,et al."Microscale Mechanism of Age Dependent Wetting Properties of Prickly Pear Cacti (Opuntia)".LANGMUIR 32.36(2016):9335-9341.
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